ATI Radeon HD 4670 vs NVIDIA GeForce GT 640 Rev. 2

VS

ATI Radeon HD 4670

NVIDIA GeForce GT 640 Rev. 2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4670 and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 Rev. 2 's Advantages

Released 4 years and 8 months late

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (40.06GB/s vs 32.00GB/s)

64 additional rendering cores

Lower TDP (49W vs 59W)

Score

Benchmark

FP32 (float)

Radeon HD 4670

0.48 TFLOPS

GeForce GT 640 Rev. 2 +67%

0.803 TFLOPS

Radeon HD 4670

VS

GeForce GT 640 Rev. 2

Graphics Card

Sep 2008

Release Date

May 2013

Radeon R700

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x8

Clock Speeds

-

1000 MHz

Memory Clock

1252 MHz

Memory

512MB

Memory Size

1024MB

GDDR3

Memory Type

GDDR5

128bit

Memory Bus

64bit

32.00GB/s

Bandwidth

40.06GB/s

Render Config

4

Compute Units

-

320

Shading Units

384

32

TMUs

32

8

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

128 KB

L2 Cache

512 KB

-

Theoretical Performance

6.000 GPixel/s

Pixel Rate

8.368 GPixel/s

24.00 GTexel/s

Texture Rate

33.47 GTexel/s

-

480.0 GFLOPS

FP32 (float)

803.3 GFLOPS

-

FP64 (double)

33.47 GFLOPS

Board Design

59W

TDP

49W

250 W

Suggested PSU

200 W

2x DVI 1x S-Video

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

None

Power Connectors

None

Graphics Processor

RV730

GPU Name

GK208

RV730 XT (215-0719047)

GPU Variant

GK208-400-A1

TeraScale

Architecture

Kepler 2.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.514 billion

Transistors

1.02 billion

146 mm²

Die Size

87 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (11_0)

3.3

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

-

CUDA

3.5

4.1

Shader Model

5.1

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